Science

2. Explore isotopes and ionisation

Mission Objectives

Define an isotope and ionisation

Use the atomic and the mass numbers to work out the number of protons, neutrons and electrons in atoms

Explain how a positive ion is formed and deduce its charge from its electron configuration and position on the periodic table

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KS4-21-02 Lesson Slide KS4-21-02 Mission Assignment KS4-21-02-Teacher Answers KS4-21-02 Handout KS4-21-02 Handout KP - PDF DE AQA Periodic Table

Keywords

Words and meanings to learn

neutron

a subatomic particle of about the same mass as a proton but without an electric charge

subatomic

smaller than or occurring within an atom

proton

a subatomic particle of about the same mass as a neutron with a positive electric charge. It has a charge of +1.

isotopes

variants of a particular chemical element which differ in neutron number, and consequently in mass number

ionisation

any process by which electrically neutral atoms or molecules are converted to ions (electrically charged atoms or molecules)

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Required Resources

Resources: Class presentation, handout and modelling materials to make a model of lithium (optional).

Handout:  Introduce the idea of history in science and the role women play in discoveries. Use this to discuss the invisibility of women in science.

Practice calculating the protons, neutrons and electrons in an atom and isotope using information from the periodic table and apply this knowledge to new examples  

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